blob: a016a3a3fcb614ad507cd016002ee30ad40fb5c6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
use nettle::{
kdf::hkdf,
hash::Sha256,
};
use crate::{
Result,
crypto::{
SessionKey,
backend::interface::Kdf,
},
};
impl Kdf for super::Backend {
fn hkdf_sha256(ikm: &SessionKey, salt: Option<&[u8]>, info: &[u8],
okm: &mut SessionKey)
-> Result<()>
{
assert!(okm.len() <= 255 * 32);
const NO_SALT: [u8; 32] = [0; 32];
let salt = salt.unwrap_or(&NO_SALT);
hkdf::<Sha256>(&ikm[..], salt, info, okm);
Ok(())
}
}
|